Repressor

A repressor is a molecule that regulates gene activity by preventing the production of specific proteins. In cells, genes are like instructions for making proteins. The repressor binds to a particular region of DNA called the operator, blocking the machinery that reads the gene. This stops the gene from being expressed—or turned on—when not needed. Repressors are essential for controlling gene activity, ensuring cells produce proteins only when necessary. They are also involved in processes like response to environmental changes and maintaining proper cellular functions.